Stapler



FIG. 1 is a top and side perspective view of a stapler, showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a side elevational view thereof taken the side opposite that shown in FIG. 2;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a stapler, as shown and described. 